DS1818R-5-U

Supervisors Overview

The DS1818R-5-U is a voltage supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 1.0V to 5.5V and features a threshold voltage of 3.06V. The device provides a low-active open-drain reset output with a minimum timeout of 100ms. It supports manual reset via an integrated pushbutton and includes power-fail detection capabilities. The component functions reliably across an operating temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates a manual pushbutton for direct user-initiated system resets
• Provides active-low open-drain reset signal generation upon power-up or fault
• Detects power failures to ensure controlled system shutdown or state preservation

Supervisors Applications

• Embedded systems requiring reliable power-on reset sequences
• Microcontroller-based designs needing manual reset functionality
• Portable electronics operating on single-cell battery supplies

Supervisors Procurement Notes

Verify the specific suffix 'U' against official manufacturer documentation to confirm package type and tape-and-reel specifications. Confirm current lifecycle status, as availability may vary. Ensure compatibility with existing PCB footprints and verify that the open-drain output configuration matches the target microcontroller input requirements.

Supervisors Selection Notes

Select this component when a simple supervisory circuit with manual reset capability is required. The 3.06V threshold suits 3.3V logic systems. Consider the SOT-23-3 package for space-constrained designs. Verify that the 100ms minimum timeout meets the processor startup time requirements. Compare against other EconoReset variants if different thresholds are needed.

Supervisors Part Context

This part belongs to the DS1818 EconoReset series, designed for cost-sensitive applications. It simplifies power management by combining supervisor and manual reset functions in a minimal footprint. The series is widely used in consumer and industrial electronics where basic power monitoring is sufficient without complex watchdog features.

Supervisors FAQ

What is the function of the pushbutton on the DS1818R-5-U?

The integrated pushbutton allows users to manually trigger a system reset independently of the power supply status.

Does the DS1818R-5-U include a watchdog timer?

No, the DS1818R-5-U is a simple reset supervisor and does not include a watchdog timer function.